document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=689242>Question 689242</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A.Using the definition pH = -log[H^+] where [H^+] is the hydrogen ion concentration, find the pH of coffee with a hydrogen ion concentration of: <BR>\n" );
document.write( "[H^+] = 5*10^-6 <BR>\n" );
document.write( "B.Using the definition above find the hydrogen ion concentration of lemonade having a pH of 3.5 </SPAN>\n" );
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document.write( "A.  5 x 1-^-6 is 5 with the decimal moved 6 places left which is .000005<P>\r<BR>\n" );
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document.write( "-log(.000005) = 5.301030\r<BR>\n" );
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document.write( "B.  3.5 = -log(H+) ---> -3.5 = log(H+) --->  antilog(-3.5) = H+ concentration (use the 10^x key on the calculator):  3x10*-4<BR>\n" );
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